1. I.M. Smith, in: Proc. of the Int. Energy Agency Carbon Dioxide Disposal Symposium, ed. P. W. F. Riemer (Pergamon, Oxford, 1993) p. 729.
2. S.H. Cho, J.-N. Kim, K.T. Joo and K.S. Park, Chem. Ind. Technol. 13 (1995) 8.
3. R.J.R. Uhlhorn, K. Keizer, and A.J. Burggraaf, J. Membr. Sci. 46 (1989) 225.
4. Y. Cho, K. Han, and K.-H.Lee, J. Membr. Sci. 104 (1995) 219.
5. Monthly Mag. Ceram. 8 (1994) 145.